Stopping attachment for phonographs



F. E. SMITH. STOPPING ATTACHMENT FOR PHONOGRAPHS.

APTUCATION FILED JUNE 1,192].

Patnoed May-9, 1922.

2 SHEETS-SHEET 1.

In veni'm y g 6 2 M ulzfi'arrzey 1,415,270. Patented May 9, 1922.

F. E. SMITH. STOPPING ATTACHMENT FOR PHONOGRAPHS.

APPLICATION FILED JUNE I, 1921,

2 SHEETS-SHEET 2- E15 2 In verghn:

19M &.

M am ;ea'r nice.

FRANK, E. SMITH, or TRG-Y, NEW YORK, assrenon or ONE-HALF TO B. aneus'rus DENNIN, or TROY, NEW YORK. I

STOP2IN'G ATTACHMENT PHONOGRAPHS.

- Application filed June 7,

To all w from may concern L' Be it known tl1fltI,FRANK E. SMITH, a citizen of the United States, residing at Troy, in the county of Rensselaer and State of New York, have'invented new and useful Improvements in Stopping Attachments for Phonographs, of which the following is a specification.

Reference may be had to the accompanying drawings, and the reference characters marked thereon, which form a part of this specification. Similar characters refer to similarparts in the several figures therein.

This invention relates to means for automatically stopping thealotation of the turntable of a phonograph or the like at the end of the record-induced movement of the tonearm of the instrument. 1

The principal object of the invention is toq-uickly'stop the rotation of the turntable upon completing the reproduction of the record without materially retarding the speed of the turntable? during the reproduction of any-part of the record.

Other objects will appear in connection with the following description.

Fig. 1 of the drawings is topplan view of a phonograph partly broken away showing my improved stopping mechanism applied thereto with the tOne arm inv inter:

mediate position and'indicating bydotted lines at. the right-hand side of the figurethe extreme and outward position of the tonearm. 7

Fig. 2: is a similar view showing the position of the parts immediately at the end of. the-reproduction of the record and indicat ingiby dot-ted lines the final braking'movement of the tone-arm which is automatically caused by my topping mechanism upon the release of the tone-arm from the controlof the record groove. 1

Fig. 3 is a cross-section taken on the broken line 3'3in Fig. 1 through the tonearm and the bracket mounted thereon;

Fig. 4c is a vertical cross section taken on the broken line 4-4 in Fig. 1.

Fig.5 is a vertical cross-section taken on the broken line 55 in Fig. 2, through the axis'of the brake-lever;

Referring to? the: drawings wherein the invention is shown in preferred form, 1 is the top or body of aphonograph upon which is rotatively: mounted: the usual turntable, 2, having a: depending peripheral flange, 3;"

Specification of Letters Patent.

Patented trays, 192 2.

1921. Serial no. 475,722.

The turntable has th usual spindle, -'l, upon which is mounted the record, 5, to rotate with the turntable.

The instrument also has the usual goose-- neck tone-arm, 6, upon the outer end of which a sound-box, 7, is mounted in the usual manner,,said sound-box carries the .usual needle. 8, engageable with the groove in the record.

The parts above described are found in the ordinary phonograph and further description thereof will be unnecessary.

. In carrying out my invention in preferred form, I mount upon the top or body, 1'. of r the phonograph a bracket, 9, upon which is pi-votall'y mounted at 10, a brake-lever, 11, carrying a brake, 12, movable into and out of engagement with the flange, 3, of the turntable, 2.

The lever, 11, may be extended out from beneath the turntable in the form of an operating handle, 13, if desired.

A link, 14, is pivot-ally connected at one end at 15 to the brake-lever, 11, and at its other end is pivotally connected at 16, with a bracket,17, carried by the tone-arm.

The pivotal connection, 16, is preferably formed by means of a hook upon the end of the link, 14, which is readily insertible in and removable from an aperture in the end of the bracket. 17. I

The bracket, 17, i in the form of aclip mounted upon the tone arm. by means of a clampingscrew, 18, as shown in Fig. 3, the bracket being adjustable longitudinally of the tone-arm by loosening the screw. 18.

The bracket can thus be secured to the tonea rm at different distances from the axis of oscillation of the tone-arm, whereby the linear movement of the pivotal connection, 16,. can be varied with respect to a given angular movement of the tonesarm.

The link, 1 f, is preferably formed of two-- members secured togethervby a screw-bolt and-slot connection, as shown in. Fig. 4', whereby the link can be lengthened or shortened from time totime as maybe found desirable.-

The pivotal connection,'15, between. the link, lt andthe brake-lever, 11, is preferably formed by means of a yoke or clip, 19 slidably adjustable longitudinally of the brake-lever and'secured in adjusted position by means of the screw-bolt pivot Y I The brake-lever, 11, is thus actuated through the bracket, 17, and link, 14, by the swinging movements of the tone-arm; and the parts are so arranged that in either extreme position of the tone-arm the brake, 12, is forced into firm or braking engagementwith the flange, 3, of the turntable, to stop the rotation of the turntable, as indicated by dotted lines in Fig. 2, and at the right-hand side of Fig. 1, while in intermediate position or" the tone-arm the brake is withdrawn from braking engagement with the flange, 3, as Shown by solid lines in Figs. 1 and 2.

' Movement of the tone-arm in one direction is induced by the engagement of the needle, 8, with the groove in the record, 5, in the usual manner, the return movement being accomplished by hand in the usual manner.

A coil-spring, 20, which connects the brake-lever, 11, with a stud, 21, on the bracket, 9, tends to move the brake-lever, 11, in the same direction in which it is moved by the record induced movement of the tonearm.

The connection of the spring, 20, with the brake-lever is niade by means of a screw, 22, by adjustment of which the tension of the spring can be regulated. The tension of the spring, 20, is thus regulated to such a degree that it is overcome by the engagement of the needle, 8, with the groove in the record. 7

The operation is as follows:

The tone-arm is withdrawn by hand in the usual manner to the position indicated by dotted lines at the right-hand side of Fig. 1, thus forcing the brake, 12, against the flange, 3, of the turntable to hold the turntable against rotation.

The desired record, 5, is applied to the turntable, the tone-arm is swung inwardly by hand to permit the turntable to rotate,

proceeds'in the usual manner, the tone-arm bemg graduallyswunginwardas the needle,

andthe needle is placed in the outer portion of the groove in the record.

The operation of the phonograph then 8, traverses the groove in the record. 7

As the needle approaches the inner'end of the groove-inthe record'the movement transmitted from the "tone-arm through the bracket, 17, and link, 14, to the brake-lever, 11, causes the brake, 12, to gradually approach the flange, 3, 0f the turntable until approximately at the time that the needle, 8, reaches the inner end of the groove in the record, the brake, 12, makes contact'or is about to make contact with the flange, 3. As soon as the needle, 8, reaches the inner end of the groove in the record, the spring, 20, which is then released from the restraining influence which was due to the engagement 01" the needle with the groove, quickly swings the tone-arm from the position. shown 'by solid lines in Fig. 2, to the position indicated by dotted lines in that figure, thus completing the braking movement of the brakelever, 11, and forcing the. brake, against the flange, 3, of the turntable.

By properly regulating the tension of the spring, 22, the braking action of said spring can be prevented so long as the needle, 8, engages the groove in the record; while a quick swinging braking movement of the tone-armwill be caused by said spring as soon as the needle, 8, reaches the inner end of said groove. I

By proper adjustment of the bracket, 17, the movement of the brake-lever, 11, can be so regulated that the brake, 12, will not efiectively engage the flange, 3, of the turntable 12, firmly until j ust'as the needle, 8, reaches the inner end of the groove in the record;

It is thus possible to elii'ectively-brake and stop the machine without any retard ng pivotally connected with the brake-lever; a-

brake carried by the brake-lever engageable with the turntable at the end of the recordinduced movement of the tone-arm; and a spring tending to move the tone-arm in the same direction in which its movement is in duced by the record,

2. In a phonograph-stopping mechanism, the combination with the tone-arm; andthe record-supporting turntable; of a brakelever; a link having one'end pivotally con nected with the tone-arm andthe other end pivotally connected with Y the brake-lever; V

and a brake carried by said brake-lever engageable with the turntable 1 in either extreme position ofthe tone-arm,

3. In a phonograph-stopping mechanism, the combination with the tone-arm; and the record-supporting turntable; of a brakelever; a link having one end pivotally connected with the tone-arm and the other end pivotally connected with the brake-lever; a

brake carried by said brake-lever engageable with the turntable in either extreme position olthe tone-arm; and a spring tending to move the tone-arm in' the same direction in which its movement is induced by the record. 4:. In a phonograph-stopping mechanism, the combination with the'tone-arm; and the record-supporting turntable; of a bracket adjustably" mounted "upon the tone-arm;

, means for securing said'bracket in selected adjusted position;"abrake:lever; a link having one'end pivotally connected with said I bracket and. the other end pivotally con-' ing one end pivotally connectedwith said bracket and the other end pivotally connected with the brake-lever; a brake can ried by said brakedever engageable with the turntable at the end of the record-induced movement of the tone-arm; and a spring tending to move the tone-arm in the, same direction in Which its movement is induced by the record.

In testimony whereof; I have hereunto set 20 my hand this 31st day of May, 1921. FRANK E. SMITH. 

